CN109505222B - Assembled netted jib tied arch bridge - Google Patents
Assembled netted jib tied arch bridge Download PDFInfo
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- CN109505222B CN109505222B CN201811308430.4A CN201811308430A CN109505222B CN 109505222 B CN109505222 B CN 109505222B CN 201811308430 A CN201811308430 A CN 201811308430A CN 109505222 B CN109505222 B CN 109505222B
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D4/00—Arch-type bridges
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/12—Grating or flooring for bridges; Fastening railway sleepers or tracks to bridges
- E01D19/125—Grating or flooring for bridges
Abstract
The invention provides an assembled netted suspender tied arch bridge, which consists of prefabricated arch ribs, prefabricated tied rods, prefabricated cross beams, netted suspenders, prefabricated bridge decks, prestressed steel bundles of the prefabricated arch ribs, prestressed steel bundles of the prefabricated tied rods, high-strength anchor rods and cast-in-place wet seams. The invention is generally suitable for highway bridges, branch overpass bridges and municipal bridges, has the span of 50-250 m, has the advantages of high assembly degree, light dead weight, strong spanning capability, high construction speed, superior mechanical property, low manufacturing cost, good landscape property and the like, and is a novel assembly type bridge structure easy to popularize.
Description
Technical Field
The invention relates to the field of new industrialized bridge construction technology, in particular to an assembled netted suspender arch bridge.
Background
In recent years, with the rapid rise of labor cost and the improvement of national environmental awareness, bridge industrialization has become the trend of times, and the thirteenth five-year planning outline of the department of transportation clearly proposes to accelerate bridge industrialization. The assembled bridge is the key direction for bridge construction development in future in China, and is beneficial to saving resource and energy, reducing construction pollution and improving labor production efficiency and quality safety level. At present, domestic fabricated bridges have achieved certain performance, but most of the fabricated bridges are limited to medium and small spans (the spans are less than 50 m). Therefore, a novel assembled bridge structure with strong spanning capability, high strength, light dead weight, high rigidity, proper cost and simple construction process is urgently sought.
The arch bridge has definite stress and beautiful shape, and is a bridge type widely used. The tied arch bridge hanger rods have various arrangement forms, and are commonly provided with vertical hanger rods, and inclined hanger rods are also called Nielsen systems and reticular hanger rod systems. Compared with the common vertical suspender arch, the Nielsen system arch using the inclined suspender to replace the vertical suspender has the advantages that the axial stress of the arch rib and the beam is not obviously different, the bending moment is greatly reduced, and the deflection matched with the bending moment is greatly reduced. The high-speed railway in China is built with a plurality of Nielsen arches with spans of 96m, 112m, 128m and the like. The netted suspender arch bridge is a tied arch bridge adopting a netted oblique suspender arrangement mode, the oblique suspender and other suspenders are crossed at least for two times, compared with a Nielsen system arch bridge, the netted suspender arch bridge reduces bending moment of arch ribs and beams to a greater extent, the stress is more reasonable, and the arch ribs and the beams are often made to be finer. From the 60 s of the 20 th century to date, a reticular boom arch bridge of about 100 seats has been built in the world. The early famous bridge is a Fermanen bridge constructed in 1963 in Germany, and the recent long-span net-shaped suspender arch bridge is an intersection bridge constructed in Neimenheng in 2013 in the Netherlands, and the main bridge structure of the bridge is a single-rib (a section of arch rib above a bridge floor is branched) underpad steel tie-bar arch with the span of 285 m. In addition, dozens of road and railway net arch bridges are built in Norway, Germany, Japan and America, and the application of the bridge is not seen in China.
The netted jib tied arch bridge is a novel structural style, almost blank in the aspect of domestic engineering application, and the superior mechanical properties and the economic performance of netted jib tied arch bridge of make full use of assembled netted jib tied arch bridge, fuse the industrialization bridge and build the theory, each component of bridge all adopts the prefabricated component of batch production, assemble through reliable connecting device between the prefabricated component, form a brand-new assembled bridge, be particularly useful for the highway bridge that the industrialization required degree is high and span is great, bridge and municipal bridge are striden on the branch line, at present home and abroad has not seen the report yet.
The invention content is as follows:
aiming at the problems of small spanning capacity, low industrialization level and the like of the assembled bridge, the invention provides an assembled reticular suspender tied arch bridge.
In order to achieve the purpose, the invention is realized by the following technical scheme:
an assembled netted jib tied arch bridge which characterized in that: the prefabricated bridge comprises prefabricated arch ribs, prefabricated tie bars, prefabricated cross beams, a net-shaped suspender, prefabricated bridge decks, prestressed steel bundles for prefabricating the arch ribs, prestressed steel bundles for prefabricating the tie bars, high-strength anchor rods and cast-in-situ wet seams;
the prefabricated arch rib and the prefabricated tie bar are integrally formed, a net-shaped suspender is arranged between the prefabricated arch rib and the prefabricated tie bar, the prefabricated cross beam is supported below the prefabricated tie bar through a high-strength anchor rod, the prefabricated cross beams are fixedly arranged below the prefabricated tie bar at intervals, the prefabricated bridge deck is paved on two adjacent prefabricated cross beams, and the prefabricated bridge deck is a cast-in-place wet joint.
The surface of the prefabricated bridge deck paved by the prefabricated cross beams is a stepped surface, the height is indirectly set, the engaging force between the prefabricated bridge deck is increased, and the integral stability of the bridge deck is enhanced.
The span of the assembled netted suspender tied arch bridge is 60m, the rise is 8.4m, and the net width of the bridge deck is 11.6 m;
the prefabricated arch rib is made of C50 concrete, the height of the cross section of the prefabricated arch rib is 0.6-0.9 m, the width of the cross section of the prefabricated arch rib is 1.2m, an internal prestress steel bundle is arranged, and the prefabricated arch rib, the prefabricated tie rod and the netted suspender form an integral prefabricated arch piece.
The prestressed steel bundles of the prefabricated arch rib adopt 2 strands of 19 steel bundles with the diameter of 15.2mm, and the strength of the prestressed steel bundles is 1860 MPa.
The prefabricated tie bar is made of C50 concrete, the cross section of the prefabricated tie bar is 0.6-1 m high and 1.2m wide, and an in-vivo prestressed steel strand is arranged.
The prestressed steel bundles of the prefabricated tie rod adopt 4 strands of 19 steel bundles with the diameter of 15.2mm, and the strength of the prestressed steel bundles is 1860 MPa.
The prefabricated beam is made of C50 concrete, the cross section of the prefabricated beam is 0.8-1 m high and 0.5m wide, an in-vivo prestressed steel bundle is arranged and connected with the prefabricated tie rod through a high-strength screw rod, and the upper surface of the prefabricated beam is provided with annular reinforcing steel bars and is connected with a cast-in-place wet joint through the annular reinforcing steel bars.
The model of the netted suspender is OVM.GJ15-12 and OVM.GJ15-15, the lower end point of the suspender is arranged along the distance of 3m between the tie bars, the included angle between the suspender and the tie bars is gradually increased, and the included angle range is 40-56 degrees.
The prefabricated bridge deck is 2.7m long, 2.1m wide and 0.15m thick, C50 concrete is adopted, the prefabricated slab is longitudinally lapped by longitudinal steel bars and longitudinally and transversely connected by a cast-in-situ wet joint.
The width of the horizontal direct cast-in-place wet joint of the prefabricated bridge deck slab is 0.3m, and the thickness of the horizontal direct cast-in-place wet joint of the prefabricated bridge deck slab is 0.25 m.
The main construction steps of the assembled netted suspender tied arch bridge can be divided into the following steps:
step (1): prefabricated arch ring, beam and bridge deck
Firstly, prefabricated components such as an arch ring, a cross beam, a bridge deck and the like are produced in a standardized manner in a prefabrication plant, as shown in figure 3, prefabricated arch ribs, prefabricated tie bars and a net-shaped suspender are integrally manufactured to form a whole prefabricated arch ring, wherein the cross sections of the prefabricated arch ribs are 0.6-0.9 m high and 1.2m wide, the cross sections of the prefabricated tie bars are 0.6-1 m high and 1.2m wide, internal prestress bundles are arranged on the prefabricated arch ribs and the prefabricated tie bars, and after the prefabricated arch ribs and the prefabricated tie bars are poured together, when the strength of concrete reaches more than 90%, the internal prestress bundles are tensioned, and the net-shaped suspender is installed and tensioned to the design force;
step (2): substructure construction
Constructing a substructure according to site and design requirements;
and (3): erection arch ring
Accurately mounting the arch ring on a support, and arranging temporary beam supports between arch ribs;
and (4): hoisting crossbeam
Hoisting a cross beam, wherein the prefabricated cross beam is connected with an arch ring tie rod through a high-strength anchor rod;
and (5): bridge deck erection
Erecting a bridge deck, adjusting the position of the bridge deck and controlling the installation precision;
and (6): cast-in-place layer of construction and bridge deck pavement
Constructing a cast-in-place wet joint between bridge decks and paving a bridge deck, and tensioning the suspender again until the bridge cable force is achieved;
and (7): and (5) removing the temporary support and getting through the vehicle.
The beneficial technical effects of the invention are as follows:
the invention creates a brand new assembled type reticular arch bridge structure by improving the reticular arch bridge and combining the industrialized construction concept, is generally suitable for highway bridges, branch overpass bridges and municipal bridges, has the span of 50-250 m, has the advantages of high assembly degree, light dead weight, strong spanning capability, high construction speed, superior mechanical property, low manufacturing cost, about 6000 manufacturing cost per square meter, good landscape property and the like, and is a novel assembled type bridge structure which is easy to popularize.
The assembled netted jib tied-arch bridge, the resultant force of jib is usually along encircleing the normal direction, and the arch axis adopts the circular arc line can be more suitable than parabola and catenary, increases jib quantity on the basis of nielsen arch, and the jib power is even for arch rib and roof beam atress are more even, and the moment of flexure is littleer, effectively reduces the cross sectional dimension of arch rib and system roof beam, and the structure is fine than ordinary bridge, and economic performance is superior and the view performance is good. The assembled netted suspender tied arch bridge has less material consumption, light structure and great rigidity, and thus has high spanning capacity up to 50-250 m.
Prefabricated components such as prefabricated arch ribs, prefabricated tie beams, prefabricated cross beams and prefabricated bridge decks are adopted in the assembled netted suspender tie-bar arch bridge, the prefabricated cross beams are connected with the prefabricated tie beams through high-strength anchor rods, high-low staggered platforms are transversely formed between the prefabricated bridge decks so as to enhance the reliability of mutual connection, and the transverse directions are connected through cast-in-place wet seams. The assembled netted jib tied-arch bridge accords with the characteristics of industrialized construction, has the modes of design standardization, production industrialization, assembly mechanization and transportation and management informatization, changes the traditional construction mode, accords with the national propulsion assembly policy, has the advantages of energy conservation and environmental protection, and is the development direction and trend of the future construction industry.
Description of the drawings:
in order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic view of the present invention;
FIG. 2 is a general detailed view of the structure of the present invention;
FIG. 3 is a schematic view of the integral prefabricated arch piece of the present invention;
FIG. 4 is a schematic view of a precast beam of the present invention;
FIG. 5 is a partial schematic view of a bridge deck according to the present invention;
FIG. 6 is a partial schematic view of the tie rod and boom attachment of the present invention;
FIG. 7 is a schematic view of an embodiment of the present invention;
numbers in the above figures: 1-prefabricated arch rib, 2-prefabricated tie rod, 3-prefabricated beam, 4-netted suspender, 5-prefabricated bridge deck, 6-cast-in-place wet joint, 7-prestressed steel beam, 8-prestressed steel beam, 9-longitudinal steel bar, 10-high-strength anchor rod and 11-annular steel bar.
The specific implementation mode is as follows:
in order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Fig. 1-6, an assembled netted suspender bowstring arch bridge, which is composed of prefabricated arch ribs 1, prefabricated tiebars 2, prefabricated beams 3, netted suspenders 4, prefabricated bridge decks 5, prefabricated arch rib prestressed steel bundles 7, prefabricated tiebar prestressed steel bundles 8, high-strength anchor rods 10 and cast-in-situ wet seams 6;
the prefabricated arch rib and the prefabricated tie bar are integrally formed, a net-shaped suspender is arranged between the prefabricated arch rib and the prefabricated tie bar, the prefabricated cross beam is supported below the prefabricated tie bar through a high-strength anchor rod, a prefabricated cross beam is fixedly arranged below the prefabricated tie bar at intervals, prefabricated bridge decks are paved on two adjacent prefabricated cross beams, and the prefabricated bridge decks are cast-in-place wet joints.
The surface of the prefabricated beam for laying the prefabricated bridge deck is a step surface, and the height is indirectly set.
The span of the assembled netted suspender tied arch bridge is 60m, the rise is 8.4m, and the net width of the bridge deck is 11.6 m;
the prefabricated arch rib is made of C50 concrete, the height of the cross section of the prefabricated arch rib is 0.6-0.9 m, the width of the prefabricated arch rib is 1.2m, an in-vivo prestressed steel bundle is arranged, and the prefabricated arch rib, the prefabricated tie rod and the netted suspender form an integral prefabricated arch piece.
The prestressed steel bundles of the prefabricated arch rib adopt 2 strands of 19 steel bundles with the diameter of 15.2mm, and the strength of the steel bundles is 1860 MPa.
The prefabricated tie bar is made of C50 concrete, the cross section of the prefabricated tie bar is 0.6-1 m high and 1.2m wide, and an in-vivo prestressed steel strand is arranged.
The prestressed steel bundle of the prefabricated tie rod adopts 4 strands of 19 steel bundles with the diameter of 15.2mm, and the strength of the prestressed steel bundle is 1860 MPa.
The prefabricated beam is made of C50 concrete, the cross section of the prefabricated beam is 0.8-1 m high and 0.5m wide, an in-vivo prestressed steel bundle is arranged and connected with the prefabricated tie rod through a high-strength screw rod, and the upper surface of the prefabricated beam is provided with annular steel bars 11 which are connected with cast-in-place wet seams through the annular steel bars.
The model of the netted suspender is OVM.GJ15-12 and OVM.GJ15-15, the lower end point of the suspender is arranged along the distance of 3m between the tie bars, the included angle between the suspender and the tie bar is gradually increased, and the included angle range is 40-56 degrees.
The prefabricated bridge deck is 2.7m long, 2.1m wide and 0.15m thick, C50 concrete is adopted, the prefabricated slab is longitudinally lapped by longitudinal steel bars 9 and is longitudinally and transversely connected by a cast-in-situ wet joint.
The width of the horizontal direct cast-in-place wet joint of the prefabricated bridge deck slab is 0.3m, and the thickness of the horizontal direct cast-in-place wet joint of the prefabricated bridge deck slab is 0.25 m.
Fig. 7, the main construction steps of the assembled netted suspender tied arch bridge can be divided into the following steps:
step (1): prefabricated arch ring, beam and bridge deck
Firstly, prefabricated components such as an arch ring, a cross beam, a bridge deck and the like are produced in a standardized manner in a prefabrication plant, as shown in figure 3, prefabricated arch ribs, prefabricated tie bars and a net-shaped suspender are integrally manufactured to form a whole prefabricated arch ring, wherein the cross sections of the prefabricated arch ribs are 0.6-0.9 m high and 1.2m wide, the cross sections of the prefabricated tie bars are 0.6-1 m high and 1.2m wide, internal prestress bundles are arranged on the prefabricated arch ribs and the prefabricated tie bars, and after the prefabricated arch ribs and the prefabricated tie bars are poured together, when the strength of concrete reaches more than 90%, the internal prestress bundles are tensioned, and the net-shaped suspender is installed and tensioned to the design force;
step (2): substructure construction
Constructing a substructure according to site and design requirements;
and (3): erection arch ring
Accurately mounting the arch ring on a support, and arranging temporary beam supports between arch ribs;
and (4): hoisting crossbeam
Hoisting a cross beam, wherein the prefabricated cross beam is connected with an arch ring tie rod through a high-strength anchor rod;
and (5): bridge deck erection
Erecting a bridge deck, adjusting the position of the bridge deck and controlling the installation precision;
and (6): cast-in-place layer of construction and bridge deck pavement
Constructing a cast-in-place wet joint between bridge decks and paving a bridge deck, and tensioning the suspender again until the bridge cable force is achieved;
and (7): and (5) removing the temporary support and getting through the vehicle.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (4)
1. An assembled netted jib tied arch bridge which characterized in that: the prefabricated bridge comprises prefabricated arch ribs, prefabricated tie bars, prefabricated cross beams, a net-shaped suspender, prefabricated bridge decks, prestressed steel bundles for prefabricating the arch ribs, prestressed steel bundles for prefabricating the tie bars, high-strength anchor rods and cast-in-situ wet seams;
the prefabricated arch rib and the prefabricated tie bar are integrally formed, a net-shaped suspender is arranged between the prefabricated arch rib and the prefabricated tie bar, the prefabricated cross beam is supported below the prefabricated tie bar through a high-strength anchor rod, a prefabricated cross beam is fixedly arranged below the prefabricated tie bar at intervals, prefabricated bridge decks are laid on two adjacent prefabricated cross beams, and a cast-in-situ wet joint is formed between the prefabricated bridge decks;
the lower end points of the suspension rods are arranged along the tie bars at intervals of 3m, the included angles between the suspension rods and the tie bars are gradually increased, and the included angles range from 40 degrees to 56 degrees;
the surface of the prefabricated beam, on which the prefabricated bridge deck is laid, is a step surface, and the height of the step surface is indirectly arranged;
the prefabricated arch rib is made of C50 concrete, the height of the cross section of the prefabricated arch rib is 0.6-0.9 m, the width of the cross section of the prefabricated arch rib is 1.2m, an in-vivo prestressed steel bundle is arranged, and the prefabricated arch rib, the prefabricated tie rod and the netted suspender form an integral prefabricated arch piece;
the prefabricated tie bar is made of C50 concrete, the section height is 0.6-1 m, the width is 1.2m, and an in-vivo prestressed steel strand is arranged;
the prefabricated cross beam is made of C50 concrete, the cross section of the prefabricated cross beam is 0.8-1 m high and 0.5m wide, an in-vivo prestressed steel bundle is arranged and connected with the prefabricated tie rod through a high-strength anchor rod, and the upper surface of the prefabricated cross beam is provided with annular steel bars which are connected with a cast-in-place wet joint through the annular steel bars;
the prefabricated bridge deck is 2.7m long, 2.1m wide and 0.15m thick, C50 concrete is adopted, the prefabricated slabs are longitudinally lapped by longitudinal steel bars and longitudinally and transversely connected by cast-in-situ wet joints;
the construction method of the assembled netted suspender tied arch bridge comprises the following steps:
step (1): prefabricated arch ring, beam and bridge deck
Firstly, producing prefabricated components in a standardized manner in a prefabrication plant, integrally manufacturing a prefabricated arch rib, a prefabricated tie bar and a net-shaped suspender to form a whole prefabricated arch ring, wherein the section of the prefabricated arch rib is 0.6-0.9 m high and 1.2m wide, the section of the prefabricated tie bar is 0.6-1 m high and 1.2m wide, the prefabricated arch rib and the prefabricated tie bar are both provided with internal prestressed bundles, after the prefabricated arch rib and the prefabricated tie bar are poured together, when the strength of concrete reaches more than 90%, tensioning the internal prestressed bundles, installing the net-shaped suspender and tensioning to the design force;
step (2): substructure construction
Constructing a substructure according to site and design requirements;
and (3): erection arch ring
Accurately mounting the arch ring on a support, and arranging temporary beam supports between arch ribs;
and (4): hoisting crossbeam
Hoisting a cross beam, wherein the prefabricated cross beam is connected with an arch ring tie rod through a high-strength anchor rod;
and (5): bridge deck erection
Erecting a bridge deck, adjusting the position of the bridge deck and controlling the installation precision;
and (6): cast-in-place layer of construction and bridge deck pavement
Constructing a cast-in-place wet joint between bridge decks and paving a bridge deck, and tensioning the suspender again until the bridge cable force is achieved;
and (7): and (5) removing the temporary support and getting through the vehicle.
2. The assembled mesh boom bowstring arch bridge of claim 1, wherein the assembled mesh boom bowstring arch bridge has a span of 60m, a rise of 8.4m and a bridge deck clear width of 11.6 m.
3. The assembled netted jib bowstring arch bridge of claim 1, wherein said prestressed steel bundles of said prefabricated arch rib are 2 19 steel bundles with a diameter of 15.2mm and a strength of 1860 MPa.
4. The fabricated netted suspender tied arch bridge of claim 1, wherein the prestressed steel bundle of the prefabricated tied bar is 4 strands of 19-mm steel bundles with a diameter of 15.2mm and a strength of 1860 Mpa.
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| CN201811308430.4A CN109505222B (en) | 2018-11-05 | 2018-11-05 | Assembled netted jib tied arch bridge |
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| CN201811308430.4A CN109505222B (en) | 2018-11-05 | 2018-11-05 | Assembled netted jib tied arch bridge |
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| CN109505252B (en) * | 2018-12-17 | 2021-01-29 | 广东省湛江公路工程大队 | Simple construction method of extra-large bridge |
| CN112411360A (en) * | 2020-12-08 | 2021-02-26 | 中铁二院工程集团有限责任公司 | Tied arch bridge with netted suspender |
| CN112695652B (en) * | 2020-12-17 | 2022-11-08 | 安徽省交通控股集团有限公司 | Web-shaped suspender arch bridge framing construction method for highway reconstruction and extension project |
| CN113322774B (en) * | 2021-05-20 | 2022-09-27 | 湖南大学 | Ultra-high performance concrete continuous cross net-shaped arch bridge and construction method thereof |
| CN114319119A (en) * | 2021-12-28 | 2022-04-12 | 山东省公路桥梁建设集团有限公司 | Construction process of main bridge of bridge |
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